On 22 Jul 2008, at 10:41, Michael Koziarski wrote:

>
>> identity map ?
>
> It's a way of guaranteeing that there's only one object with a given
> id in a given context:
>
> http://martinfowler.com/eaaCatalog/identityMap.html
>

Ah yes. I had an inkling that might be what you were talking about.  
That itself might introduce some subtle differences in behaviour

Fred

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